. >> reporter: a confident, reinvigorated mitt romney alongside paul ryan tried to capitalize on the campaign's fresh momentum. >> i got the chance to ask the questions people around the country want to ask. why is he pushing obama care when 20 million people are out of work. >> reporter: romney made news on a topic he wasn't asked about on the debate, appearing on fox news he repute ated earlier comments, writing off 47% of americans. >> you're going to say something that doesn't come out right. in this case i said something completely wrong, and i absolutely believe, however, that my life has shown that i care about 100%. >> reporter: in wisconsin where the crowd swelled to more than 30,000, president obama arrived armed with new energy and attack lines against romney that were absent from wednesday's debate. all but calling his opponent a liar. >> governor romney may dance around his position, he may do a tap dance and a two step, but if you want to be president, then you owe the american people the truth. >> reporter: mr. obama's top advisers can see the president needs to come back fight